'MW2' DLC fails to work on Xbox Live

Infinity Ward's Stimulus Pack DLC for Modern Warfare 2 launched today on Xbox Live, but failed to work for those who tried to access it.

The pack, which opens up five multiplayer maps for the first-person shooter, suffered a technical hitch after becoming available for Xbox 360 gamers.

Writing on Twitter earlier today, Xbox Live editor Daniel Maher said: "Stimulus Package update: We're looking into why they aren't working, but we suspect a new title update is required and is due shortly."

The DLC was due to launch alongside a title update for Modern Warfare 2, delivering tweaks to the One Man Army perk and some improvements to the matchmaking system.

In a later message, Microsoft's Larry 'Major Nelson' Hyrb said that the DLC will need a further title update to operate effectively, with engineers working on that now.

"The Stimulus Package needs a title update and it didn't go out properly. We're pushing it out now - it won't be long," he wrote.

The pack, which will also launch soon for PS3 and PC gamers, is priced at 1200 Microsoft Points (£10.20). However, it has faced criticism from some users of being overpriced, especially as two of the maps are from the first Modern Warfare.